Zinnia Profusion Fire
Flowers are a natural for an outdoor party. Tutera recommends using plants rather than cut flowers, since you can keep them for yourself after the party is over. Grab a flat or two of zinnias in brilliant orange hues, which are colorful, and work as a transition color into fall. Transplant the flowers into small pots and place them around the pool (with the candles) and on tables.
I'd rather have a low maintenance cactus than fresh cut flowers, but a bouquet of Cymbidium Garnet Orchids from the Vera Wang Collection certainly wouldn't go unappreciated in the Delicious household.
Marigold are another option for potted flowers as decor at an outdoor pool party. Because they're hardy, they'll keep for long after the party's over.